Create hasura.json (#36)

This is my first time working with a docker-compose file, but this seems to work fine. Original file taken from https://github.com/hasura/graphql-engine/tree/master/install-manifests/docker-compose-postgis this version has Postgis included

public/v1/apps/hasura.json

@@ -0,0 +1,57 @@
+{
+    "captainVersion": "1",
+    "documentation": "Hasura GraphQL Engine",
+    "dockerCompose": {
+        "version": "3.6",
+        "services": {
+            "$$cap_appname-db": {
+                "image": "mdillon/postgis:$$cap_mdillon_postgis_version",
+                "notExposeAsWebApp": "true",
+                "volumes": [
+                    "$$cap_appname-db-data:/var/lib/postgresql/data"
+                ],
+                "restart": "always"
+            },
+            "$$cap_appname": {
+                "image": "hasura/graphql-engine:$$cap_hasura_version",
+                "containerHttpPort":"8080",
+                "depends_on": [
+                "$$cap_appname-db"
+                ],
+                "restart": "always",
+                "environment": {
+                "HASURA_GRAPHQL_DATABASE_URL": "postgres://postgres:@srv-captain--$$cap_appname-db:5432/postgres",
+                "HASURA_GRAPHQL_ENABLE_CONSOLE": "true",
+                "HASURA_GRAPHQL_ADMIN_SECRET":"$$cap_admin_secret"
+                }
+            }
+        }
+    },
+    "instructions":{
+        "end":"Hasura is deployed and available as $$cap_appname. \n\n IMPORTANT: It will take up to 2 minutes for Hasura to be ready. Before that, you might see 502 error page.\n",
+        "start":"Instant Realtime GraphQL on Postgres with web admin cosole. This Docker Compose setup runs Hasura GraphQL Engine along with a Postgres database with the PostGIS extension."
+     },
+     "variables":[
+        {
+           "defaultValue":"v1.0.0-alpha40",
+           "description":"Checkout their github page for their latest version https://github.com/hasura/graphql-engine",
+           "id":"$$cap_hasura_version",
+           "label":"Hasura Version",
+           "validRegex":"/^([^\\s^\\/])+$/"
+        },
+        {
+          "defaultValue":"11",
+          "description":"mdillon/postgis provides a Docker container running Postgres with PostGIS installed. Checkout their docker page for their available tags https://hub.docker.com/r/mdillon/postgis/tags",
+          "id":"$$cap_mdillon_postgis_version",
+          "label":"mdillon/postgis Version",
+          "validRegex":"/^([^\\s^\\/])+$/"
+       },
+        {
+           "description":"The admin secret gives you access to the console.",
+           "id":"$$cap_admin_secret",
+           "label":"Hasura admin secret(password)",
+           "validRegex":"/^(?=.*\\d).{10,}$/"
+        }
+     ]
+
+}